Inboard Diesel Jackshafted Vs. Twins on a Seamark

[Snookerd]

As some of you know, I have a 23SF that was originally a diesel inboard. Currently the boat is bracketed with an Aluminum bracket with twin 225's with the prop pocket glassed over. This is a future job, but I am rebuilding the boat with one of these choices in mind. Even if I rebuild the original transom myself, the cost of the new bracket, motors, rigging, ect. is around 30K. Since I already have the stringers and motor bay intack, and the old saddle tanks still in place I would not have as much retro-fitting. I would then, not have to rebuild the transom and would have a transom outdrive for a more efficient prop position for speed (40+ knots)and the benefits of trim/tilt here where it's shallow all over the place. I am thinking of the efficiency/lower center of gravity and better boat balance/Ect.. I think my price would the same or less with the diesel. I understand about the outdrive seal sitting in the water. I am looking for responses regarding initial cost, maintenance costs, boat balance, and resale.